When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges. The earth is like a giant magnet, but unlike two free hanging magnets, the north pole of a magnet is attracted to the north pole of the earth.

A magnet has two ends called poles; one end is the north pole and the other is the south pole. A north pole will attract a south pole; the magnets pull on each other. But the two north poles will push each other away. The magnet is attracted by the earth’s magnetic north pole and always points in that direction.

Each one reinforces the magnetic fields of the others. Each one has a tiny north and south pole. If you cut one in half, the newly cut faces will become the new north or south poles of the smaller pieces.

(a) Yes, there can be a magnet with no pole e.g. in case of a toroid carrying current.

Artificial magnets can be created by doping iron, nickel, and/or cobalt with other elements. Doping with rare earth materials has been particularly successful, producing very strong magnets.

Magnetic monopole, hypothetical particle with a magnetic charge, a property analogous to an electric charge. As yet there is no evidence for the existence of magnetic monopoles, but they are interesting theoretically. …

A magnetic monopole does not exist. Just as the two faces of a current loop cannot be physically separated, magnetic North pole and the South pole can never be separated even on breaking a magnet to its atomic size. If there are charges then magnetic field will be created due to their movements.

In physics, when we have two, opposite charges or poles connected together, we call it a dipole, but when we have one by itself, we call it a monopole. Gravitational and electric “charges” and their forces. Gravitational monopoles are easy: it’s just a mass.

Electrons and protons are electric monopoles, though we don’t usually refer to them that way. This means they have a single charge, with protons being a positive monopole, and electrons being a negative one.

Universal Characteristics of Magnets and Magnetic Poles Further experimentation shows that it is impossible to separate north and south poles in the manner that + and − charges can be separated. The magnet’s two poles are labeled N and S for north-seeking and south-seeking poles, respectively.

To our knowledge, it is not possible to produce a permanent magnet with only a single pole. Every magnet has at least 2 poles, a north and a south pole (see FAQ about north pole). The existence of magnetic monopoles itself does not contradict current popular theories.

Why there are no magnetic monopoles The electron doesn’t have an electric field, it has an electromagnetic field. So it doesn’t have an electric charge, it has an electromagnetic charge. There are no magnetic monopoles because of the screw nature of electromagnetism, which is all about twist and turn.

Even if you exclude the Earth’s magnetic field, life without magnets would be very different and much worse. Without magnets healthcare would decline, communications would falter, and landfills would overflow. There would be no electricity.

The force of a magnetic field on a particle with spin causes the particle to rotate it’s spin to align with the magnetic field. Taking these two ideas together, then, the Earth’s magnetic field will cause the magnet to align north to south. That’s why people named them the north and south poles.

One of them is that electric charge is associated with electric field lines—Gauss’s law. A second is the law that there is no true magnetic charge (so the flux of through any closed surface is always zero). In addition, Maxwell tried to develop an analogy due to Faraday, between electric currents and magnetic fields.

Magnetic Force Formula (Charge-Velocity)

1. = magnetic force vector (Newtons, N) q = charge of a moving particle (Coulombs, C)
2. = particle velocity vector (m/s) v = particle velocity magnitude (m/s)
3. = magnetic field vector (Teslas, T)
4. = angle between velocity and magnetic field vectors (radians)

A magnet is a rock or a piece of metal that can pull certain types of metal toward itself. The force of magnets, called magnetism, is a basic force of nature, like electricity and gravity. Magnetism works over a distance. This means that a magnet does not have to be touching an object to pull it.

An electron at rest in a magnetic field experiences no force, so cannot be set in motion by the magnetic field. If it were placed at rest in an electric field, it will accelerate under the electrostatic force.

Electric Currents and Magnetism Electric current is the source of all magnetism. Figure 7. (a) In the planetary model of the atom, an electron orbits a nucleus, forming a closed-current loop and producing a magnetic field with a north pole and a south pole.

Earth’s south magnetic pole is near Earth’s geographic north. Earth’s magnetic north pole is near Earth’s geographic south. That’s why the north pole of a compass points toward north because that’s where Earth’s south magnetic pole is located and they attract.

The magnetic field is the area around a magnet that has magnetic force. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field. The piece of iron has become a magnet.

The Earth’s magnetic field is generated in the fluid outer core by a self-exciting dynamo process. Electrical currents flowing in the slowly moving molten iron generate the magnetic field.

Permanent magnets are made from special alloys (ferromagnetic materials) such as iron, nickel and cobalt, several alloys of rare-earth metals and minerals such as lodestone.

Magnetic materials are always made of metal, but not all metals are magnetic. Most other metals, for example aluminium, copper and gold, are NOT magnetic. Two metals that aren’t magnetic are gold and silver.

What you need: a magnet and the piece of jewelry in question. What to do: Hold the magnet up to the gold. If it’s real gold it will not stick to the magnet. (Fun fact: Real gold is not magnetic.)